# Quirky Resolution

We have the file


We see only white color.
Analyzing the file, we can see that each pixel is either (255, 255, 255) (white), or (254, 254, 254), so indistinguishable by eyes.

Create a new file with all (254, 254, 254) pixels to (0, 0, 0) (black) to clearly see the pattern.

```py
#!/usr/bin/env python
from PIL import Image
import numpy as np

img = np.array(Image.open('quirky_resolution.png'))
for i in range(img.shape[0]):
for j in range(img.shape[1]):
for k in range(img.shape[2]):
if img[i][j][k] == 254:
img[i][j][k] = 0
Image.fromarray(img).save('qr.png')
```


It's a QR code. Scan this file using any QR scanner and get the flag.

```txt
rgbCTF{th3_qu1rk!er_th3_b3tt3r}
```

Original writeup (https://github.com/goswami-rahul/ctf/tree/master/rgbCTF2020/quirky_resolution).